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[LON-CAPA] /
loncom /
auth /
lonauth.pm
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Mon Aug 27 00:52:45 2012 UTC (11 years, 10 months ago) by
raeburn
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- Move &loginhelpdisplay() from lonlogin.pm to lonauth.pm to facilitate reuse.
- Log-in help page configuration moved from helpsettings to login section in
Domain configuration interface.
- Add ability to upload different help files for the different supported languages.
- Link to log-in help page depends on user's browser language preferences.
1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.122 2012/08/27 00:52:45 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonauth;
30:
31: use strict;
32: use LONCAPA;
33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use DynaLoader; # for Crypt::DES version
36: use Crypt::DES;
37: use Apache::loncommon();
38: use Apache::lonnet;
39: use Apache::lonmenu();
40: use Apache::createaccount;
41: use Fcntl qw(:flock);
42: use Apache::lonlocal;
43: use Apache::File();
44: use HTML::Entities;
45:
46: # ------------------------------------------------------------ Successful login
47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
49: $form) = @_;
50:
51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
55: {'extra_env' => $extra_env,});
56:
57: my $public=($username eq 'public' && $domain eq 'public');
58:
59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
60:
61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
65:
66: # ------------------------------------------------- Check for critical messages
67:
68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
69: if ($what[0]) {
70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
71: $lowerurl='/adm/email?critical=display';
72: }
73: }
74:
75: # ------------------------------------------------------------ Get cookie ready
76: $cookie="lonID=$cookie; path=/";
77: # -------------------------------------------------------- Menu script and info
78: my $destination = $lowerurl;
79:
80: if (defined($form->{role})) {
81: my $envkey = 'user.role.'.$form->{role};
82: my $now=time;
83: my $then=$env{'user.login.time'};
84: my $refresh=$env{'user.refresh.time'};
85: my $update=$env{'user.update.time'};
86: if (!$update) {
87: $update = $then;
88: }
89: if (exists($env{$envkey})) {
90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
92: \$trolecode,\$tstatus,\$tstart,\$tend);
93: if ($tstatus eq 'is') {
94: $destination .= ($destination =~ /\?/) ? '&' : '?';
95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
96: $destination .= 'selectrole=1&'.$newrole.'=1';
97: }
98: }
99: }
100: if (defined($form->{symb})) {
101: my $destsymb = $form->{symb};
102: $destination .= ($destination =~ /\?/) ? '&' : '?';
103: if ($destsymb =~ /___/) {
104: # FIXME Need to deal with encrypted symbs and urls as needed.
105: my ($map,$resid,$desturl)=split(/___/,$destsymb);
106: unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
107: $desturl = &Apache::lonnet::clutter($desturl);
108: }
109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
111: $destination .= '&destinationurl='.$desturl.
112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
115: $destination .= '&destinationurl='.$destsymb;
116: }
117: }
118: if ($destination =~ m{^/adm/roles}) {
119: $destination .= ($destination =~ /\?/) ? '&' : '?';
120: $destination .= 'source=login';
121: }
122:
123: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
124: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
125: my $brcrum = [{'href' => '',
126: 'text' => 'Successful Login'},];
127: my $start_page=&Apache::loncommon::start_page('Successful Login',
128: $header,
129: {'bread_crumbs' => $brcrum,});
130: my $end_page =&Apache::loncommon::end_page();
131:
132: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
133: # ------------------------------------------------- Output for successful login
134:
135: &Apache::loncommon::content_type($r,'text/html');
136: $r->header_out('Set-cookie' => $cookie);
137: $r->send_http_header;
138:
139: my %lt=&Apache::lonlocal::texthash(
140: 'wel' => 'Welcome',
141: 'pro' => 'Login problems?',
142: );
143: my $loginhelp = &loginhelpdisplay($domain);
144: if ($loginhelp) {
145: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
146: }
147:
148: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
149: $r->print(<<ENDSUCCESS);
150: $start_page
151: $windowinfo
152: <h1>$lt{'wel'}</h1>
153: $welcome
154: $loginhelp
155: $continuelink
156: $end_page
157: ENDSUCCESS
158: }
159:
160: # --------------------------------------------------------------- Failed login!
161:
162: sub failed {
163: my ($r,$message,$form) = @_;
164: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
165: my $retry = '/adm/login?username='.$form->{'uname'}.
166: '&domain='.$form->{'udom'};
167: if (exists($form->{role})) {
168: $retry .= '&role='.$form->{role};
169: }
170: if (exists($form->{symb})) {
171: $retry .= '&symb='.$form->{symb};
172: }
173: my $end_page = &Apache::loncommon::end_page();
174: &Apache::loncommon::content_type($r,'text/html');
175: $r->send_http_header;
176: $r->print(
177: $start_page
178: .'<h1>'.&mt('Sorry ...').'</h1>'
179: .'<p class="LC_warning">'.&mt($message).'</p>'
180: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
181: .'</p>'
182: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
183: .$end_page
184: );
185: }
186:
187: # ------------------------------------------------------------------ Rerouting!
188:
189: sub reroute {
190: my ($r) = @_;
191: &Apache::loncommon::content_type($r,'text/html');
192: $r->send_http_header;
193: my $msg='<h1>'.&mt('Sorry ...').'</h1>'
194: .&mt('Please [_1]log in again[_2].');
195: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
196: }
197:
198: # ---------------------------------------------------------------- Main handler
199:
200: sub handler {
201: my $r = shift;
202: my $londocroot = $r->dir_config('lonDocRoot');
203: my $form;
204: # Are we re-routing?
205: if (-e "$londocroot/lon-status/reroute.txt") {
206: &reroute($r);
207: return OK;
208: }
209:
210: &Apache::lonlocal::get_language_handle($r);
211:
212: # -------------------------------- Prevent users from attempting to login twice
213: my $handle = &Apache::lonnet::check_for_valid_session($r);
214: if ($handle ne '') {
215: my $lonidsdir=$r->dir_config('lonIDsDir');
216: if ($handle=~/^publicuser\_/) {
217: # For "public user" - remove it, we apparently really want to login
218: unlink($r->dir_config('lonIDsDir')."/$handle.id");
219: } else {
220: # Indeed, a valid token is found
221: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
222: &Apache::loncommon::content_type($r,'text/html');
223: $r->send_http_header;
224: my $start_page =
225: &Apache::loncommon::start_page('Already logged in');
226: my $end_page =
227: &Apache::loncommon::end_page();
228: my $dest = '/adm/roles';
229: if ($env{'form.firsturl'} ne '') {
230: $dest = $env{'form.firsturl'};
231: }
232: $r->print(
233: $start_page
234: .'<p class="LC_warning>"'.&mt('You are already logged in!').'</p>'
235: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
236: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
237: .'</p>'
238: .$end_page
239: );
240: return OK;
241: }
242: }
243:
244: # ---------------------------------------------------- No valid token, continue
245:
246:
247: my $buffer;
248: if ($r->header_in('Content-length') > 0) {
249: $r->read($buffer,$r->header_in('Content-length'),0);
250: }
251: my %form;
252: foreach my $pair (split(/&/,$buffer)) {
253: my ($name,$value) = split(/=/,$pair);
254: $value =~ tr/+/ /;
255: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
256: $form{$name}=$value;
257: }
258:
259: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
260: &failed($r,'Username, password and domain need to be specified.',
261: \%form);
262: return OK;
263: }
264:
265: # split user logging in and "su"-user
266:
267: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
268: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
269: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
270: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
271:
272: my $role = $r->dir_config('lonRole');
273: my $domain = $r->dir_config('lonDefDomain');
274: my $prodir = $r->dir_config('lonUsersDir');
275: my $contact_name = &mt('LON-CAPA helpdesk');
276:
277: # ---------------------------------------- Get the information from login token
278:
279: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
280: $form{'serverid'});
281:
282: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
283: ($tmpinfo eq 'no_such_host')) {
284: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
285: return OK;
286: } else {
287: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
288: $form{'serverid'});
289: if ( $reply ne 'ok' ) {
290: &failed($r,'Session could not be opened.',\%form);
291: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
292: return OK;
293: }
294: }
295:
296: if (!&Apache::lonnet::domain($form{'udom'})) {
297: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
298: return OK;
299: }
300:
301: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
302: if ($rolestr) {
303: $rolestr = &unescape($rolestr);
304: }
305: if ($symbstr) {
306: $symbstr= &unescape($symbstr);
307: }
308: if ($rolestr =~ /^role=/) {
309: (undef,$form{'role'}) = split('=',$rolestr);
310: }
311: if ($symbstr =~ /^symb=/) {
312: (undef,$form{'symb'}) = split('=',$symbstr);
313: }
314:
315: my $keybin=pack("H16",$key);
316:
317: my $cipher;
318: if ($Crypt::DES::VERSION>=2.03) {
319: $cipher=new Crypt::DES $keybin;
320: }
321: else {
322: $cipher=new DES $keybin;
323: }
324: my $upass='';
325: for (my $i=0;$i<=2;$i++) {
326: my $chunk=
327: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
328:
329: $chunk.=
330: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
331:
332: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
333: $upass.=$chunk;
334: }
335:
336: # ---------------------------------------------------------------- Authenticate
337:
338: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
339: my ($cancreate,$statustocreate) =
340: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
341: my $defaultauth;
342: if (ref($cancreate) eq 'ARRAY') {
343: if (grep(/^login$/,@{$cancreate})) {
344: $defaultauth = 1;
345: }
346: }
347: my $clientcancheckhost = 1;
348: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
349: $form{'udom'},$defaultauth,
350: $clientcancheckhost);
351:
352: # --------------------------------------------------------------------- Failed?
353:
354: if ($authhost eq 'no_host') {
355: &failed($r,'Username and/or password could not be authenticated.',
356: \%form);
357: return OK;
358: } elsif ($authhost eq 'no_account_on_host') {
359: if ($defaultauth) {
360: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
361: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
362: return OK;
363: }
364: my $start_page =
365: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
366: my $lonhost = $r->dir_config('lonHostID');
367: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
368: my $contacts =
369: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
370: $form{'udom'},$origmail);
371: my ($contact_email) = split(',',$contacts);
372: my $output =
373: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
374: $domdesc,'',$lonhost,
375: $contact_email,$contact_name,
376: undef,$statustocreate);
377: &Apache::loncommon::content_type($r,'text/html');
378: $r->send_http_header;
379: &Apache::createaccount::print_header($r,$start_page);
380: $r->print('<h3>'.&mt('Account creation').'</h3>'.
381: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
382: $output.&Apache::loncommon::end_page());
383: return OK;
384: } else {
385: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
386: return OK;
387: }
388: }
389:
390: if (($firsturl eq '') ||
391: ($firsturl=~/^\/adm\/(logout|remote)/)) {
392: $firsturl='/adm/roles';
393: }
394: # --------------------------------- Are we attempting to login as somebody else?
395: if ($form{'suname'}) {
396: # ------------ see if the original user has enough privileges to pull this stunt
397: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
398: # ---------------------------------------------------- see if the su-user exists
399: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
400: eq 'no_host') {
401: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
402: # ------------------------------ see if the su-user is not too highly privileged
403: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
404: # -------------------------------------------------------- actually switch users
405: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
406: ' logging in as '.$form{'suname'});
407: $form{'uname'}=$form{'suname'};
408: } else {
409: &Apache::lonnet::logthis('Attempted switch user to privileged user');
410: }
411: }
412: } else {
413: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
414: }
415: }
416:
417: my ($is_balancer,$otherserver) =
418: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
419:
420: if ($is_balancer) {
421: if (!$otherserver) {
422: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
423: }
424: if ($otherserver) {
425: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
426: \%form);
427: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
428: } else {
429: $r->print(&noswitch());
430: }
431: return OK;
432: } else {
433: if (!&check_can_host($r,\%form,$authhost)) {
434: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
435: if ($otherserver) {
436: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
437: \%form);
438: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
439: } else {
440: $r->print(&noswitch());
441: }
442: return OK;
443: }
444:
445: # ------------------------------------------------------- Do the load balancing
446:
447: # ---------------------------------------------------------- Determine own load
448: my $loadlim = $r->dir_config('lonLoadLim');
449: my $loadavg;
450: {
451: my $loadfile=Apache::File->new('/proc/loadavg');
452: $loadavg=<$loadfile>;
453: }
454: $loadavg =~ s/\s.*//g;
455: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
456: my $userloadpercent=&Apache::lonnet::userload();
457:
458: # ---------------------------------------------------------- Are we overloaded?
459: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
460: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
461: if (!$unloaded) {
462: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
463: }
464: if ($unloaded) {
465: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
466: undef,\%form);
467: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
468: return OK;
469: }
470: }
471: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
472: \%form);
473: return OK;
474: }
475: }
476:
477: sub check_can_host {
478: my ($r,$form,$authhost,$domdesc) = @_;
479: return unless (ref($form) eq 'HASH');
480: my $canhost = 1;
481: my $lonhost = $r->dir_config('lonHostID');
482: my $udom = $form->{'udom'};
483: my @intdoms;
484: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
485: if (ref($internet_names) eq 'ARRAY') {
486: @intdoms = @{$internet_names};
487: }
488: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
489: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
490: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
491: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
492: my $hostname = &Apache::lonnet::hostname($lonhost);
493: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
494: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
495: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
496: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
497: my $loncaparev;
498: if ($authhost eq 'no_account_on_host') {
499: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
500: } else {
501: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
502: }
503: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
504: $udomdefaults{'remotesessions'},
505: $defdomdefaults{'hostedsessions'});
506: }
507: unless ($canhost) {
508: if ($authhost eq 'no_account_on_host') {
509: my $checkloginvia = 1;
510: my ($login_host,$hostname) =
511: &Apache::lonnet::choose_server($udom,$checkloginvia);
512: &Apache::loncommon::content_type($r,'text/html');
513: $r->send_http_header;
514: if ($login_host ne '') {
515: my $protocol = $Apache::lonnet::protocol{$login_host};
516: $protocol = 'http' if ($protocol ne 'https');
517: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
518: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
519: '<h3>'.&mt('Account creation').'</h3>'.
520: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
521: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
522: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
523: &Apache::loncommon::end_page());
524: } else {
525: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
526: '<h3>'.&mt('Account creation unavailable').'</h3>'.
527: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
528: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
529: &Apache::loncommon::end_page());
530: }
531: } else {
532: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
533: $form);
534: my ($otherserver) = &Apache::lonnet::choose_server($udom);
535: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
536: }
537: }
538: return $canhost;
539: }
540:
541: sub noswitch {
542: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
543: '<h3>'.&mt('Session unavailable').'</h3>'.
544: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
545: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
546: &Apache::loncommon::end_page();
547: return $result;
548: }
549:
550: sub loginhelpdisplay {
551: my ($authdomain) = @_;
552: my $login_help = 1;
553: my $lang = &Apache::lonlocal::current_language();
554: if ($login_help) {
555: my $dom = $authdomain;
556: if ($dom eq '') {
557: $dom = &Apache::lonnet::default_login_domain();
558: }
559: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
560: my $loginhelp_url;
561: if ($lang) {
562: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
563: if ($loginhelp_url ne '') {
564: return $loginhelp_url;
565: }
566: }
567: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
568: if ($loginhelp_url ne '') {
569: return $loginhelp_url;
570: } else {
571: return '/adm/loginproblems.html';
572: }
573: }
574: return;
575: }
576:
577: 1;
578: __END__
579:
580:
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